udel.edu

Valid Email Server
Domain Lookup › udel.edu

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
udel.edu
Yes
✓ Yes
Google
No
Yes
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-18 02:09:31 UTC · ↺ Refresh

MX Hostnames

  • aspmx.l.google.com
  • aspmx2.googlemail.com
  • aspmx5.googlemail.com
  • aspmx3.googlemail.com
  • alt1.aspmx.l.google.com
  • alt2.aspmx.l.google.com
  • aspmx4.googlemail.com

MX Priorities

  • aspmx4.googlemail.com: 30
  • aspmx5.googlemail.com: 30
  • aspmx.l.google.com: 10
  • alt1.aspmx.l.google.com: 20
  • alt2.aspmx.l.google.com: 20
  • aspmx2.googlemail.com: 30
  • aspmx3.googlemail.com: 30

A / AAAA Records

  • 128.175.13.247

Mail Server IPs

  • 192.178.223.27 ↩ yulhrs-in-f27.1e100.net
  • 2a00:1450:4009:c0f::1b ↩ yulhrs-in-f27.1e100.net
  • 173.194.76.27 ↩ ws-in-f27.1e100.net
  • 2a00:1450:400c:c00::1b ↩ ws-in-x1b.1e100.net
  • 64.233.180.26 ↩ pe-in-f26.1e100.net
  • 2607:f8b0:4004:c1f::1b ↩ pd-in-f27.1e100.net
  • 108.177.123.27 ↩ lcscld-in-f27.1e100.net
  • 2800:3f0:4003:c0f::1a (no PTR)
  • 172.253.116.26 ↩ dj-in-f26.1e100.net
  • 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net

SOA Record

Raw SOA dns1.udel.edu hostmaster.udel.edu 100910 86400 14400 604800 600
Primary NS (mname)
dns1.udel.edu
Admin Email (rname)
hostmaster@udel.edu
Serial
100910
Refresh
86400s
Retry
14400s
Expire
604800s
Minimum TTL
600s

Nameservers (NS)

dns2.udel.edu
adns1.nnn.upenn.edu
adns2.nnn.upenn.edu
adns3.nnn.upenn.edu
dns1.udel.edu

SPF Record

✓ Soft Fail (~all)
v=spf1 ip4:128.175.0.0/16 ip4:128.4.0.0/16 ip4:216.52.6.88 ip4:216.52.6.188 ip4:129.146.91.38 ip4:129.146.146.59 include:_spf.google.com include:technolutions.net include:spf.protection.outlook.com ?all
📊 DNS lookups: 3/10
? Neutral (?all) — no enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; sp=none; adkim=s; aspf=s; fo=0; pct=0; ri=43200; rua=mailto:[email protected]; ruf=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Strict · DKIM alignment: Strict
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
⚠ Policy applies to 0% of failing messages only

DKIM Selectors

✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ DKIM properly configured for selector: selector1

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

9 records
  • MS=ms22927527
  • iCAuIRbjTdvds2zAtzMRfrlOF/PjOQmGhPXSNyhAd0Tqum3hGk8R9kXUAJqvsHTlLujXmlAtKC2b/KqaeCqNwg==
  • apple-domain-verification=5n78usXJfZ0vgTey
  • atlassian-domain-verification=kG5tMbcO4mksxqW6e8BuXdMh5ZfICECWRBFNGQYAp9BJNVUWHy71TMrvSPLHanM9
  • atlassian-sending-domain-verification=41dba828-b297-4b7c-bafe-a2ccf4d25f2b
  • sending_domain1080123=dcdd9207f11fd0a6c2ef603dc43fa59e33707821671c9616c6587b550d1f40cc
  • pardot1080123=37ec00bb9c8c1b3c5165ed96c9e2a52482eef50ee2518a4d9523f82b32ecc241
  • SPFv=spf1 ip4:128.175.0.0/16 ip4:128.4.0.0/16 ip4:216.52.6.88 ip4:216.52.6.188 ip4:129.146.91.38 ip4:129.146.146.59 include:_spf.google.com include:technolutions.net include:spf.protection.outlook.com ?all
  • URu4AGWOcDvKe4PwSDHvdS762TlVseaVc+du0jd4Gv3vIq0YI3VUuJ/6eTiiAxqSEfU4P7imWQeO7jWKqboZ/g==
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